799994609 has 4 divisors (see below), whose sum is σ = 827580660. Its totient is φ = 772408560.

The previous prime is 799994597. The next prime is 799994617. The reversal of 799994609 is 906499997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906499997 = 13 ⋅69730769.

It can be written as a sum of positive squares in 2 ways, for example, as 219040000 + 580954609 = 14800^2 + 24103^2 .

It is a cyclic number.

It is not a de Polignac number, because 799994609 - 2²⁰ = 798946033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (799994659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13792982 + ... + 13793039.

It is an arithmetic number, because the mean of its divisors is an integer number (206895165).

Almost surely, 2^799994609 is an apocalyptic number.

It is an amenable number.

799994609 is a deficient number, since it is larger than the sum of its proper divisors (27586051).

799994609 is a wasteful number, since it uses less digits than its factorization.

799994609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27586050.

The product of its (nonzero) digits is 9920232, while the sum is 62.

The square root of 799994609 is about 28284.1759469849. The cubic root of 799994609 is about 928.3156814841.

The spelling of 799994609 in words is "seven hundred ninety-nine million, nine hundred ninety-four thousand, six hundred nine".